Thread-protector.



No. 744,213. l l PATENTED NOV. 17, 1903. G. W. LA V00.

THRRAD PROTECTOR. APPLICATION FILED JAN. 27. 1903.

NQ MODEL.

wz gums PETERS co., PNoTo-LlHoR. WASHINGTON. n, c.

WITNESSIS UNITED STATES Patented November 17, 1903.

PATENT OFFICE.

TH READ-PROTECTOR.

SPECIFICATION forming part of Letters Patent No. 744,213, dated November17, 1903.

Application filed January 27, 1903. Serial No. 140,783. (No model.)

To @ZZ whom, it may concern:

Be it known that I, GEORGE WILLIAM LA VOO, of Steubenville, Jeffersoncounty, Ohio, have invented a new and useful Thread-Protector, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, formingpart of this specification, inwhich- Figure 1 is an end View of my improved thread-protector. Fig. 2is a cross-section on the line II II of Fig. 1, and Fig. 3 is an endview of a modified form.

My invention relates to the class of threadprotectors whichare placedupon the screwthreaded ends of pipes or tubes to protect the threadsduring transit, and is designed to provide a cheap and efficient articleof this char acter which will accommodate itself to variations in thepipes and threads. Heretofore these protectors have either been formedof a welded ring or of la ring with the ends held together by a clip orconnecting-piece. In either case the rings must be made with variationsfor the same size and several varied rings of the same general sizecarried in stock to fit the variations in different pipes of the samegage.

My improved protector consists of a springring of resilient materialhaving inner screW- threaded portions, the ends of the ring being free,so that the ring is held in place by its own resiliency and may befitted to varying sizes of the same gage of pipe.

In the drawings, referring to Figures l and 2, I show a protectorconsisting of a collar or ring a, the ends b of which lap over eachother, but are not welded. The overlapping portion may extend around thering to any de-v sired distance and may be extended to form two layersaround the circumference, if desired. I have shown the ring as providedwith internal screw-threads c throughout the inner surface; but thesethreads may extend for a part or parts only of the length of the ringand may be mutilated either longitudinally or transversely. In Fig. 3 Ishow a similar ring a', except that the ends b' do not overlap but areleft with a slight gap between them. In this form a spanner may beintroduced into the gap to open the ring slightly, and thus aid inplacing it on the pipe or in removal.

The advantages of my invention result from the simplicity and cheapnessof the protector and its ease of application to and removal from thepipe. The threaded pipe ends are usually tapered, and the ring ispreferably shaped to t over the outer threads and then is forced to theinner end of the threaded portion, thus tting the variations of size ofpipes.

Variations may be made in the form and arrangement of the protector andits threads without departing from my invention.

set my hand.

GEORGE WILLIAM LA VOO.

Witnesses:

JOHN BAXTER, W. E. BEsWEEK.

